#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
int main()
{
    int a = 0;
    int b = 0;
    scanf("%d %d", &a, &b);
    int i = 0;
    int count = 0;
    while (i < 32)
    {
        if (((a >> i) & 1) != ((b >> i) & 1))
            count++;
        i++;
    }
    printf("%d", count);
    return 0;
}